Stereoselective Direct
<i>N</i>
‐Trifluoropropenylation of Heterocycles with a Hypervalent Iodonium Reagent
作者:János T. Csenki、Ádám Mészáros、Zsombor Gonda、Zoltán Novák
DOI:10.1002/chem.202102840
日期:2021.11.11
E-selective trifluoropropenylation of versatile N-heterocycles was developed with the utilization of trifluoropropenyliodonium salts. The procedure enables the straightforward direct introduction of the trifluoroalkenyl moiety into heterocyclic scaffolds under simple and mild reaction conditions.
Fluorination of 3,5-diarylpyrazole substrates by Selectfluor (TM) in acetonitrile gave 4,4-difluoro-1H-pyrazoles in addition to 4-fluoropyrazole derivatives. The structure of this new class of fluorinated heterocycle was established by X-ray crystallography.
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